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| author | Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> | 2013-10-07 09:45:04 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-10-29 21:25:28 +0100 |
| commit | 70002f76db5f8ed4ab72f539fc600510e2a98022 (patch) | |
| tree | 2847d99eeec2e4be97fd1e70edcc385c25faad10 /arch/mips | |
| parent | f7886e87546cc68844e8edb66150aaaeacaf7204 (diff) | |
| download | talos-obmc-linux-70002f76db5f8ed4ab72f539fc600510e2a98022.tar.gz talos-obmc-linux-70002f76db5f8ed4ab72f539fc600510e2a98022.zip | |
MIPS: Get rid of hard-coded values for Malta PIIX4 fixups
Make the code more readable by using defines.
Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6031/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/mips-boards/piix4.h | 23 | ||||
| -rw-r--r-- | arch/mips/pci/fixup-malta.c | 36 |
2 files changed, 46 insertions, 13 deletions
diff --git a/arch/mips/include/asm/mips-boards/piix4.h b/arch/mips/include/asm/mips-boards/piix4.h index a02596cf1abd..06d483131dc4 100644 --- a/arch/mips/include/asm/mips-boards/piix4.h +++ b/arch/mips/include/asm/mips-boards/piix4.h @@ -1,6 +1,7 @@ /* * Carsten Langgaard, carstenl@mips.com * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. + * Copyright (C) 2013 Imagination Technologies Ltd. * * This program is free software; you can distribute it and/or modify it * under the terms of the GNU General Public License (Version 2) as @@ -20,6 +21,28 @@ #ifndef __ASM_MIPS_BOARDS_PIIX4_H #define __ASM_MIPS_BOARDS_PIIX4_H +/* PIRQX Route Control */ +#define PIIX4_FUNC0_PIRQRC 0x60 +#define PIIX4_FUNC0_PIRQRC_IRQ_ROUTING_DISABLE (1 << 7) +#define PIIX4_FUNC0_PIRQRC_IRQ_ROUTING_MASK 0xf +#define PIIX4_FUNC0_PIRQRC_IRQ_ROUTING_MAX 16 +/* Top Of Memory */ +#define PIIX4_FUNC0_TOM 0x69 +#define PIIX4_FUNC0_TOM_TOP_OF_MEMORY_MASK 0xf0 +/* Deterministic Latency Control */ +#define PIIX4_FUNC0_DLC 0x82 +#define PIIX4_FUNC0_DLC_USBPR_EN (1 << 2) +#define PIIX4_FUNC0_DLC_PASSIVE_RELEASE_EN (1 << 1) +#define PIIX4_FUNC0_DLC_DELAYED_TRANSACTION_EN (1 << 0) + +/* IDE Timing */ +#define PIIX4_FUNC1_IDETIM_PRIMARY_LO 0x40 +#define PIIX4_FUNC1_IDETIM_PRIMARY_HI 0x41 +#define PIIX4_FUNC1_IDETIM_PRIMARY_HI_IDE_DECODE_EN (1 << 7) +#define PIIX4_FUNC1_IDETIM_SECONDARY_LO 0x42 +#define PIIX4_FUNC1_IDETIM_SECONDARY_HI 0x43 +#define PIIX4_FUNC1_IDETIM_SECONDARY_HI_IDE_DECODE_EN (1 << 7) + /************************************************************************ * IO register offsets ************************************************************************/ diff --git a/arch/mips/pci/fixup-malta.c b/arch/mips/pci/fixup-malta.c index 07ada7f8441e..df36e2327c54 100644 --- a/arch/mips/pci/fixup-malta.c +++ b/arch/mips/pci/fixup-malta.c @@ -1,5 +1,6 @@ #include <linux/init.h> #include <linux/pci.h> +#include <asm/mips-boards/piix4.h> /* PCI interrupt pins */ #define PCIA 1 @@ -53,7 +54,8 @@ int pcibios_plat_dev_init(struct pci_dev *dev) static void malta_piix_func0_fixup(struct pci_dev *pdev) { unsigned char reg_val; - static int piixirqmap[16] = { /* PIIX PIRQC[A:D] irq mappings */ + /* PIIX PIRQC[A:D] irq mappings */ + static int piixirqmap[PIIX4_FUNC0_PIRQRC_IRQ_ROUTING_MAX] = { 0, 0, 0, 3, 4, 5, 6, 7, 0, 9, 10, 11, @@ -63,11 +65,12 @@ static void malta_piix_func0_fixup(struct pci_dev *pdev) /* Interrogate PIIX4 to get PCI IRQ mapping */ for (i = 0; i <= 3; i++) { - pci_read_config_byte(pdev, 0x60+i, ®_val); - if (reg_val & 0x80) + pci_read_config_byte(pdev, PIIX4_FUNC0_PIRQRC+i, ®_val); + if (reg_val & PIIX4_FUNC0_PIRQRC_IRQ_ROUTING_DISABLE) pci_irq[PCIA+i] = 0; /* Disabled */ else - pci_irq[PCIA+i] = piixirqmap[reg_val & 15]; + pci_irq[PCIA+i] = piixirqmap[reg_val & + PIIX4_FUNC0_PIRQRC_IRQ_ROUTING_MASK]; } /* Done by YAMON 2.00 onwards */ @@ -76,8 +79,9 @@ static void malta_piix_func0_fixup(struct pci_dev *pdev) * Set top of main memory accessible by ISA or DMA * devices to 16 Mb. */ - pci_read_config_byte(pdev, 0x69, ®_val); - pci_write_config_byte(pdev, 0x69, reg_val | 0xf0); + pci_read_config_byte(pdev, PIIX4_FUNC0_TOM, ®_val); + pci_write_config_byte(pdev, PIIX4_FUNC0_TOM, reg_val | + PIIX4_FUNC0_TOM_TOP_OF_MEMORY_MASK); } } @@ -93,10 +97,14 @@ static void malta_piix_func1_fixup(struct pci_dev *pdev) /* * IDE Decode enable. */ - pci_read_config_byte(pdev, 0x41, ®_val); - pci_write_config_byte(pdev, 0x41, reg_val|0x80); - pci_read_config_byte(pdev, 0x43, ®_val); - pci_write_config_byte(pdev, 0x43, reg_val|0x80); + pci_read_config_byte(pdev, PIIX4_FUNC1_IDETIM_PRIMARY_HI, + ®_val); + pci_write_config_byte(pdev, PIIX4_FUNC1_IDETIM_PRIMARY_HI, + reg_val|PIIX4_FUNC1_IDETIM_PRIMARY_HI_IDE_DECODE_EN); + pci_read_config_byte(pdev, PIIX4_FUNC1_IDETIM_SECONDARY_HI, + ®_val); + pci_write_config_byte(pdev, PIIX4_FUNC1_IDETIM_SECONDARY_HI, + reg_val|PIIX4_FUNC1_IDETIM_SECONDARY_HI_IDE_DECODE_EN); } } @@ -108,10 +116,12 @@ static void quirk_dlcsetup(struct pci_dev *dev) { u8 odlc, ndlc; - (void) pci_read_config_byte(dev, 0x82, &odlc); + (void) pci_read_config_byte(dev, PIIX4_FUNC0_DLC, &odlc); /* Enable passive releases and delayed transaction */ - ndlc = odlc | 7; - (void) pci_write_config_byte(dev, 0x82, ndlc); + ndlc = odlc | PIIX4_FUNC0_DLC_USBPR_EN | + PIIX4_FUNC0_DLC_PASSIVE_RELEASE_EN | + PIIX4_FUNC0_DLC_DELAYED_TRANSACTION_EN; + (void) pci_write_config_byte(dev, PIIX4_FUNC0_DLC, ndlc); } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0, |
